Baker & Holes.— THE ALEYROD1D.+: of soüth america 633 



of material frora differeut parts of the Americas. Two 

 lots — one frora Jamaica and oue from México — shoAV a 

 median dark brown stripe move or less developed. One 

 collection from Brazil, of which the host is unknown, is 

 remarkable in that the thorax of all the pupa cases is 

 yellow, whereas the abdomen is uniform dark brown. 

 This phase is very striking and so far has not beem met 

 with in any of the other collections. A fonrth phase, and 

 a fairly common one, has the dorsal disk dark brown and 

 the sub-raarginal área, together with the marginal tubes 

 yellow. Floccossa differs frora hoicard'i only in the comb- 

 like projections candad of the vasiforra oriñce. They are 

 found side by side on citrus and the relation of these two 

 forras will only be deterrained after carefiil life history 

 studies of both. The species has been collected in the 

 following places in South America: Typical hoirardi seeras 

 to be a raore uorthern form. 



Localitv Host CoUeelor Date 



Bureau 

 N.o 



Bahia, Brazil . ? ? Maicli 1883 Q. 3150 



Cera. » ... Giiava F. Rocha Jan. líJOlj Q. 74(j 



» .. Citrus . » » » Q. 1832 



Brazil . ? April 1914 Q. 8863 



Argentina » ? May 1010 Q. 5261 



Tiicuman, 



Argentina . T. C. Barber June 1!)U (^). 8883 



Georgetown. B. 



Guiana » G. A. Boilkin Jan. 2. 1913 (^). 8832 



Villa Encarna- 

 ción Barcliaris gcui><- 



tclloides ISchrottky Xov. 1905 Q. 1(580 



Aleui'otlirlxus (Aleiu'othrixusj g^avelil3LA^íCHAKu. 



Aleurothrixus graveli BIanchard,Physis, lY (1018) 

 p. 344. 



This species is very closely related to Aleurothrixus 

 (V'pim Goeldi. It possesses in the pupa case the same 

 number of raarginal spines situated in the same regions 

 and the cases aro otherwisc the same with the exception 

 of ihe vasiform oriñce. There is the same difference bet- 

 ^vecn (/rareli and (('rpim as between lioivardi and ^ffuccom. 

 The orífice is armed with an apparent comb on its poster- 

 ior marsin. 



